Abstract:
:The behavioural and electrocortical power spectrum effects of tryptoline and the 5-hydroxy and 5-methoxy derivatives were studied after microinjection of the drugs into the third cerebral ventricle in freely moving rats. The three compounds produced a dose-dependent desynchronication in electrocortical activity with a concomitant syndrome of behavioural stimulation. The most potent compound was 5-methoxytryptoline, already active at 4 nmol. When given into the third cerebral ventricle, 5-methoxytryptoline antagonized the sedation and hypothermia induced by reserpine. The relative order of potencies was 5-methoxytryptoline greater than 5-hydroxytryptoline greater than tryptoline. Melatonin, the 5-methoxy-N-acetyl derivative of serotonin, when injected into the third cerebral ventricle, did not produce desynchronization and elicited only mild sedation. The high potency of 5-methoxytryptoline following injection into the third cerebral ventricle and the relative order of potencies with 5-hydroxytryptoline and tryptoline is compared to the affinity of these compounds for the modulatory site of the serotonin transporter which was labelled with [3H]imipramine or [3H]paroxetine.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Nistico G,De Sarro GB,Langer SZdoi
10.1016/0014-2999(87)90660-1subject
Has Abstractpub_date
1987-10-06 00:00:00pages
121-8issue
1eissn
0014-2999issn
1879-0712pii
0014-2999(87)90660-1journal_volume
142pub_type
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